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the sequence is 3,16,42,81,133.

it is increasing by the multiples of 13

diff between 3 and 16 is 13

diff between 42 and 16 is 26 and so on

next number after 133 will be  198 as the 5th multiple is 65

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Hey subtraction is wrong
what do u mean now I have edited it
Becareful some may report
The missing number is 198.The logic is the multiples of13areadded.3+13=16,16+13×2=42,42+13×3=81,81+13×4=133,133+13×5=198....
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